Feeding device for stay-applying machines.



H. DE SMITH; FEEDING DEVICE FOR STAY APPLYING MACHENES APPLICATION men JULY 22.1916;

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H. DE SMITH.

FEEDING DEVICE FOR STAY APPLYING MACHINES. I

APPLICATION FILED JULY 22.1916.

Patented Apr. 23,1918.

2 SHEETS-SHEET 2- lll llTlElW dTdrTEd PATENT Ult -FT@EW HENRY DE SMITH, 0F ROCHESIPER, NEW YORK, ASSIGNOR TO M. D. KNOWLTON COMPANY, OF ROCHESTER, NEW YORK A CORPORATION OF NEW YORK.

FEEDING DEVICE FOR STAY-APPLYING MACHINES.

Specification of Letters Patent.

Patented Apr. 23, 1918.

Application filed July 22, 1916. Serial No. 110,707.

To all whom it may concern:

Be it known that I, HENRY DE SMITH, a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New Yorlghave invented certain new and useful Improvements in Feeding 'Devices for stay ripplying Machines, of

which the following 1s a specification.

My invention relates to that class of ma chines adapted for applying stays or reinforcing strips to the corner joints of boxes made of paperboard or like material, in which are embodied staystrip applying means and stay-strip feeding means; the said feeding means being operative to feed a stay-strip from a supply roll to said applying means to be operated upon thereby in usual and well known manner.

The feeding means in most common use in this class of machines comprise a reciprocating strip-engaging device and means for operating the same in 'a manner whereby it will b caused on its forward feeding stroke to engage and carry forward the strip and then become released from said strip at the limit of its forward stroke so as to move backwardly without producing any corresponding backward movement of the strip. Such feeding device comprises a carrier having mounted thereon two cooperating gripping members arranged to permit of the passage of the stay-strip therebetween, one of which members is stationary with respect to the carrier and the other pivoted for movement to and from a gripping position relative to said stationary member. Con nected with this movable gripping member is an actuating means which, in the operation of the machine, first rocks said member into gripping engagement with the strip, and then, by a continued movement, imparts a forward stroke to the complete feed device. Such forward stroke of the feed device determines the forward feeding of the staystrip. It sometimes happens, however, that the pivoted gripping member after being initially brought into engagement with the strip, rebounds from the strip and then moves forward slightly before it again positively grips the strip, or it may lose its hold on the strip when brought into reengagemcnt therewith, then move forward slightly and then grip again. This means short and consequently inaccurate feedin Because of this, it has been the object of my invention to provide means for preventing rebound of the movable gripping member and maintaining the same in gripping relation with the strip during feeding movement after its initial engagement therewith. This object I attain by means of my improved feeding device as illustrated in the accompanying drawings, in which Figure 1 is a side elevation of part of a stay-applying machine provided with my invention.

Fig. 2 is an enlarged view of the feed device removed from its connection with the machine and showing the upper gripping member in lowered strip-engaging position.

Fig. 3 is a similar view showing the upper gripping member in raised strip-releasing posltlon.

Fig. 4c is an enlarged sectional plan view of the feed device, with the section taken on the line l-d of Fig. 1, and showing a piece of stay strip in position engaged by the device.

Fig. 5 is a view similar to Figs. 2 and 3 illustrating tion, and

Figs. 6 and 7 are details showing different positions assumed by the parts in Fig. 5, at different times in the operation of the device.

Similar reference characters indicate like parts in the several figures of the drawings.

The machine here shown as provided with my invention is a stayer of well known construction and operation, and therefore will be only briefly described herein.

The several parts constituting the machine are mounted upon a suitable supporting frame, indicated generally by the reference numeral 2. In the upper part of this frame is journaled a drive shaft 3 having at its rear end a clutch-controlled drive pulley 4-.

At the front end of the machine is the stay-applying means, comprising two cooperating presser dies, the lower of which, indicated at 5, is normally stationary and adapted to support a box-corner, while the upper one, indicated at 6, is vertically mo able and adapted to press a stay-strip upon the, box-corner on said lower die. The movable die 6 is mounted in a reciprocating head 7 which is actuated from a crank-pin on the drive shaft 3 through the medium of a pitman 8, in usual manner a a modified form of my inven- In the operation of themachine, the staystrip, indicated at s, is adapted to be fed from a supply reel (not shown) to a position between said presser dies, by a suitable feed device. This feed device comprises a reciprocatory carrier plate 9 slidably connected with a stationary guide plate 10 and having connected therewith two cooperating gripping members, one of which, indicated at 11, is fixed with respect to the plate 9 and arranged to engage with the stay-strip at the under side thereof, and the other, indicated at 12, is pivoted to the plate 9 and arranged to engage with the stay-strip at the upper side thereof. With this construction of feed device, the movable or pivoted member 12 should be caused to coiiperate with the lower member 11 to engage and carry forward the strip upon the forward stroke of the device, and to release the strip at the limit of said forward stroke and maintain such release during the return stroke of the device. Such operation of the feed device is effected in the present case by means of an actuating lever 13, pivoted at its upper end to the frame at 1 1, and at its lower end connected through a link 15 with a lever arm 16 of the pivoted member 12. The lever 13 is given its forward throw by a cam 17 on the shaft 2 engaging a roll 18 thereon, and is given its return throw by a connecting spring 19. Upon the forward throw of the lever 13, the member 12 is first caused to rock downward into gripping engagement with the strip lying over the lower member, as shown in Fig. 2, after which, the continued movement of the lever effects an advance of the feed devicecomprising the carrier 9 and supported members-and engaged strip. After the lever has swung forward a predetermined distance, it is then retracted, thereby operating to first raise the member 12 to strip-releasing position by rocking its arms 16 into contact with a stop projection 20 on the carrier plate 9, as shown in Fig. 3, and then returning the feed device to its starting position.

The machine as thus far described is of usual construction and operation and does not require a more detailed description for the proper understanding of my present invention. A

Inorder to prevent rebound of the grip ping member or aw 12 from the stay-strip after being initially brought into engagement therewith, I provide means for yieldingly maintaining a gripping relation between said member and the strip throughout the feeding stroke of the device. This means, as shown in Figs. 1 to 4 inclusive, comprises a spring-pressed detent 21 mounted in the lever arm 16 ofthe member 12 and adapted, when said member is rocked downward into gripping engagement with the strip, to enter a holding seat or depression 22 in the carrier plate 9, as most clearly shown in Fig. 1, whereby it will act to yieldingly hold the member to its position of gripping engagement with the strip and prevent rebound of the same. After the feed device has completed its forward or feed stroke, said detent will readily yield from its position of holding engagement in the seat 22, upon the member 12 being rocked to releasing position under the action of the lever 13, as shown by dotted lines in Fig. l.

The detent 21, as here shown, extends through a transverse opening in the arm 16 of the gripping member and has a spring 23 on one end expanding between the arm 16 and an enlarged head on the detent, for normally forcing the latter to position for entering the seat 22 in the plate 9. A nut 24 threaded onto the opposite end of the detent pin provides an adjustable stop for engagement with the adjacent side of the arm 16 to limit the forward movement of the detent under the action of said spring 28.

In Figs 5, 6 and 7, I have shown another embodiment of my invention. In this case, the pivoted member 12 carries at its front end a dog 25 for direct engagement with the stay-strip, which is yieldingly supported by said member for a limited vertical movement relative thereto. This is accomplished as here shown by supporting said dog in an open vertical slot in the end of the member 12 by means of a pin o screw 26 )assing through a vertically elongated slot 2 therein, and by a spring .28 attached to the member 12 with its front end bearing against-the topof said dog and holding it in a normal lowered position with the upper end wall of its slot 27 in contact with the screw 26, as shown in Fig. 6.

With this construction and arrangement of parts, when the member 12 is rocked downward by the action of the lever 13, this gripping dog 25 will be brought to a stop upon reaching a position of grippin engagement wlth the stay-strip, after which a slight additional movement of the member '12 will take place until the pin 26 carried thereby contacts with the lower end of the slot 27 in the dog, as shown in Fig. 5, at which time the feed device will commence its forward feeding stroke. In case of a slight rebound of the pivoted member 12, however, its gripping relation with the staystrip will be maintained by the dog 25, as

shown in Fig. 7, which will be yieldingly held to its gripping position by the spring 28; this being )ermitted by the vertically elongated slot in the dog allowing of the upward movement of the pin 26 therein, as shown.

What I claim is 1. In a stay-applying machine, a stay strip feeding device comprising a reciprocating carrier, a pair of cooperating gripping members mounted on said carrier and one of which is movable to and from a gripping position relative to the other, actuating means connecting directly with said movable me1nher fo moving the same to and from its gripping position and also imparting reciprocating movement to the carrier, and means for yieldingly maintaining said movable gripping member in gripping relation with its cooperatng member during the working stroke of the device, said means comprising two cooperating holding members one of which is carried by the movable gripping member and the other by the carrier.

2. Inastayapplying machine, a stay strip feeding device comprising a reciprocating carrier, a pair of cooperating gripping members mounted on said carrier and one of which is movable to and from a gripping position relative to the other, actuating means connecting directly with said movable member for moving the same to and from, its gripping position and also imparting reciprocating movement to the carrier, and means for yieldingly maintaining said movable gripping member in gripping relation with its cooperating member during the working stroke of the device, said means comprising a spring-pressed detent and a cooperating holding seat therefor one of which is carried by the movable gripping member and the other by the carrier.

In a stay-applying machine, a stay strip feeding device comprising a reciprocating carrier, a pair of cooperating gripping members mounted on said carrier and one of which is pivoted for movement to and from a gripping position relative to the other, actuating means connecting directly with said pivoted member for moving the same to and from its gripping position and also imparting reciprocating movement to the carrier, and means for yieldingly maintaining said movable gripping member in gripping relation with its cooperating member during the working stroke of the device, said means comprising a spring-pressed detent mounted in a transverse opening in the gripping member with one end projecting laterally therefrom and a cooperatingholding seat on the carrier in which said detent is received when the gripping member is in gripping position.

Signed at Rochester, in the county of Monroe, and State of New York, this 10th day of July, A. D. 1916.

HENRY DE SMITH.

itnesses Tnos. D. PATTON, HUBERT J. MARTIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G. 

